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Tunnel second lining reinforcing steel bar protection layer control construction method

A technology of steel protective layer and construction method, applied in tunnel lining, tunnel, shaft lining and other directions, can solve the problems of damaged tunnel quality, excessive thickness of steel protective layer, affecting the quality of secondary lining, etc., and achieve the effect of improving installation quality

Active Publication Date: 2020-01-17
GANSU ROAD & BRIDGE CONSTR GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reasons are as follows: First, the on-site construction personnel do not fully understand the importance of the protective layer of steel bars, which can easily lead to excessive or insufficient thickness of the protective layer of steel bars, which seriously affects the quality of the secondary lining; second, the thickness of the protective layer is not adjusted according to the different use environments Reasonable adjustments, failure to take reasonable countermeasures for the reduction in the thickness of the protective layer caused by the decline of the vault, etc.; these are the key factors that cause damage to the quality of the tunnel

Method used

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  • Tunnel second lining reinforcing steel bar protection layer control construction method
  • Tunnel second lining reinforcing steel bar protection layer control construction method
  • Tunnel second lining reinforcing steel bar protection layer control construction method

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Embodiment Construction

[0038] Exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0039] figure 1 It is a schematic diagram of the planar layout of the protective layer of steel bars according to the present invention, such as figure 1 As shown: several circumferential positioning ribs N1 of the first layer of reinforcement protection layer are arranged along a predetermined distance, and the predetermined distance is 1.5-3.5 meters. In a preferred emb...

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Abstract

The invention discloses a tunnel second lining reinforcing steel bar protection layer control construction method, and relates to the technical field of tunnel construction. The method comprises the specific steps of reinforcing steel bar positioning, wherein in the tunnel longitudinal and annular direction, positioning ribs are symmetrically mounted from the centre of an arch top to the two sides, connecting positions of longitudinal distribution ribs and / or annular main ribs are marked on the positioning ribs, inverted arch reinforcing steel bars of the first length are reserved in a construction joint of an inverted arch following wall, joints of adjacent longitudinal main ribs and / or the annular main ribs are staggered by the first width or above, and the thickness of a concrete net protection layer is the first thickness; and reinforcing steel bar mounting, wherein according to the reserved position, the longitudinal distribution ribs and / or annular main ribs are fixed to the connecting positions, the distribution ribs are laid and fixed, and finally, stirrups are laid. Through the implementation manner, the second lining reinforcing steel bar mounting quality is improved, andthe design needs are ensured.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a method for controlling the construction of the steel bar protective layer of the second lining of the tunnel. Background technique [0002] The secondary lining of the tunnel is the secondary lining of the tunnel. It is a reinforced concrete structure that is poured on the inner side of the primary support in the tunnel engineering construction by molding or secondary lining integral trolley. Relatively speaking, the secondary lining and the initial support refer to the inner lining built with concrete and other materials under the condition of the initial support of the tunnel, so as to achieve reinforcement support, optimize the route waterproof and drainage system, beautify the appearance and facilitate installation Communication, lighting, monitoring and other facilities to meet the requirements of modern high-speed road tunnel construction. [0003] In the concrete stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/00
CPCE21D11/10E21D11/00
Inventor 陈万明李远新张晓乾吴伟峰祁波
Owner GANSU ROAD & BRIDGE CONSTR GROUP
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